Albert herrmann



UNITED STATES PATENTn FFI ALBERT HERRMANN, OF HGCHST-ON-THE-MAIN. GERMANX ASS IGNOR TO THE FARBVVERKE, VORMALS MEISTER, LUULUS & BRUNING, OF SAME PLACE.

BLUE-GREEN DYE.

SPECIFICATION forming part of LetterePatent No. 422,018, dated February 25, 1890.

' Application filed April 24, 1889. Serial No.308,4=20. (Specimens) To all whom it may concern:

Be it known that I, ALBERT HERRMANN, doc tor of philosophy, a citizen of the Empire of Germany, residing at Hochst-on-the-Wlain, in the Empire of Germany, have invented certain new and useful Improvements in Green Blue Coloring-Hatter; and I do hereby declare the following to be a full, clear, and exact description of the invention such as will enable others skilled in the art to which it appertains to make and use the same.

In the manufacture of the coloring-matters described in Patents Nos. 412,613, 412,614, and 2,615, I have discovered still another coloring-matter, a derivative of the metaoxydiamidotriphenylmethan,

o n onem \ROGH'INHRH via, the metaoxytetralkyldiamidotriphenyl methan of unsymmetric constitution. Two diiferent tertiary aromatic bases are condensed with metanitrobenzaldehyde. The leuco base of this coloring-matter is produced by condensingmetanitrobenzaldehyde With tertiary aromatic amines, (Berichte der Deutschen chemichen Gesellschaft 12, 802,) the leuco base reduced into the corresponding inetaamido leuco base. This latter base, in cold diluted acid solution, is treated with a nitrate (one molecule) and the replacement of the amide by the hydroxyl caused to take place by boiling until the development of nitrogen ceases. In this manner I prepare inetaoxytri methyl b en 2 y 1 di amidotriphenylmethan, metaoXytriaethylbenzyldiamidotriphenylmethan, metaoxydimethylaethylbenzyldiamidotriphenylmethan, metaoxydiaet b y l m eth ylbenz yldiamidotriphen yl methan, 1netaoxyethylmethylethylbonzyldiamid o t r iphen yl 1n othan I canon 02H; on c,n.,i-I-or1 metaoxyethylmethylmethylbenzyldi a m 1 d 0 t-riphenylmethan,

canon om, CH-C I-LN metaoxymethylbenzylethylbenzyldiamidotri phenylmethan,

on cit-mam o H N on om, metaoxydiethyldibenzyldiamidot r i p 11 e n yl methan, non-symmetric,

oHo,H,,N oH,

m etaoxydiethyldibenzyldiamido t ri p11 e n y lmethan, non-symmetric; metaoxymethylethyldibenzyldiamidotriphenylmethan, nonsymmetric. The same base may be obtained also by treatin g one part, by molecular Weight, of metaoxybenzaldehyde with one part, by molecular Weight, each of dimethylaniline, and one part, by molecular Weight, of methylbenzylaniline; diethylaniline and one part, by molecular weight, of ethylbenzylaniline; dimethylaniline and one part, by molecular Weight, of ethylbenzylaniline; diethylaniline and one part, by molecular Weight, of methylbenzylaniline; methylbenzylaniline and one part, by molecular Weight, of ethylbenzylaniline; ethylmethylaniline and one part, by molecular Weight, of methylbenzyllaniline; methylethylaniline and one part, by molecular Weight, of cthylbonzylaniline; dimethylaniline and one part, by molecular Weight, of dibenzylaniline; diethylaniline and one part, by molecular Weight, of dibenzylaniline; ethylmethylaniline and one part, by molecular weight, of dibenzylaniline, in the presence of condensing agentssuch as sulphuric acid ch1orzincand in manner as described more fully in the other applications aforesaid. This metaoxyleuco base is converted into the sulphonic acid by treatment With sulphuric acid, or, preferably, fuming sulphuric acid and this acid oxidated to coloring-matter.

The new coloring-matter is in the form of a copper-red powder having metallic luster, soluble in Water, alcohol, and benzine or petroleum spirit. It dissolves readily in Water with a blue tint and dyes Wool and silk in an acid bath quite even green blue shades prominentby great fastness.

What I claim as new, and desire to secure by Letters Patent, is-

The new coloring-matter described, of unsymmetric constitution, derived from metaoxytetralkyldiamidotriphenylmethan, the article being a copper-red powder of metallic luster, dyeing a bluish-green, soluble in water, alcohol, and benzine or petroleum spirit, substantially as set forth.

In testimony whereof I affix my signature 25 in presence of two witnesses.

ALBERT I-IERRMANN. Witnesses:

J'osEF REVERDY, HEINRICH HAHN. 

